FES Propeller Manual Version 1.0
February 2013
Page 4 of 9
Warning:
People who fly should recognize that various types of risks are involved, and they
should take all precautions to minimize them, since they cannot be eliminated entirely.
The propeller is a vital component of the aircraft. A mechanical failure could cause a
forced landing or create vibrations sufficiently severe to damage the aircraft. Propellers
are subject to constant vibration stresses from the motor and air stream, which are added
to high bending and centrifugal stresses.
Before a propeller was certified as being safe to operate on an airplane, an
adequate margin of safety was demonstrated.
It is essential that the propeller is properly maintained according to the recommended
service procedures and a close watch must be exercised to detect impending problems
before they become serious. Unusual vibration should be investigated and fixed, as it
could be a warning that something is going wrong.
We urge you to read this Manual thoroughly. It contains important information
about your propeller. The propeller is one of the most critical parts having vital importance
to the flight safety. It therefore deserves the care and maintenance called for in this
Manual. Please give it your attention, especially the section dealing with inspections and
checks.
